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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 334 · 40 questions
TalentJR

Remember (Add in a row, share side by side): Series: R total = R1 + R2 + R3 … Parallel, equal resistors: R total = R ÷ number of resistors (two equal → half). Then I = V ÷ R total. Example: 6 V across 4 Ω + 8 Ω = 12 Ω → 0.5 A.

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  1. 1.🧮 A 22 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 20 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 2.6 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 22 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  9. 9.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 20 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 50 Ω, 330 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 20 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 68 Ω, 220 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  26. 26.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 33 Ω, 33 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 220 Ω resistor is joined in series with two equal 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 72
  2. 450
  3. 50
  4. 0.25
  5. 0.2
  6. 132
  7. 10
  8. bigger
  9. 10
  10. 185
  11. 860
  12. 25
  13. 20
  14. 0.25
  15. 100
  16. 0.1
  17. 820
  18. 550
  19. 50
  20. 10
  21. 354
  22. 0.1
  23. 0.5
  24. 218
  25. less than either one
  26. 0.1
  27. 136
  28. 1
  29. 202
  30. 219
  31. 800
  32. 42
  33. 100
  34. 5
  35. 25
  36. 100
  37. 230
  38. 5
  39. 83
  40. 67

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